The Submenu tab allows you to choose the color schemes and enable/disable border.
1. Log into your Blogger dashboard.
2. Go to Theme > Customize > Advanced > Submenu.
3. Make necessary changes > Save.
Change the value to apply the color schemes and enable/disable border:
Choose the color scheme from the 3 options:
Submenu Color Schemes:
Standard: Value 0px to enable. Use the blog's default colors.
Scheme 1: Value 1px to enable.
Scheme 2: Value 2px to enable.
Scheme 3: Value 3px to enable.
Show the border:
Submenu Border:
To disable: Value 0px to disable.
To enable: Value 1px to enable.